Railway-traffic-controling apparatus



"3 K a? H INVENTOR: v cwmn.

N NN 4 w rwp v Q H WN C. W. FAILOR RAILWAY TRAFFIC CONTROLLING APPARATUS Filed 001. 22, 1926 Sept. 4, 192 8.

the section next in advance is energized, the

Patented Sept. 4, 1928.

UNITED STA TES PATENT OFFICE.

onnnnns w. FAILUR, or rrrrsieunen, PENNSYLVANIA, assrouon. 'ro rnn UNION swrrcn & SIGNAL COMPANY, or SWISSVALE, PENNSYLVANIA, A conronarron OF PENNSYLVANIA.

RAILWAY-TRAFFIC-CONTRULING APPARATUS.

Application filed. October 22, 1926. Serial No. 143,404.

My invention relates to railway trailic con trolling apparatus, and particularly to apparatus of the type wherein train-carried governing mechanism controlled by en ergy received from the trackway. More specifically the present invention relates to the trackway portion of such apparatus.

I will describe one term of apparatus e111- hodying my invention, and will then point out the novelfeatures thereof in claims.

The accompanying drawing is a diag ainmatic View showing one form of apparatus embodying my invention. Referring to the d airing, the reference characters 1 and l, designate the track rails of a railway along which traiilc normally moves in the direction indicated by the arrow. These rails are divided icy insulated joints 2 into a plurality of track sections, of which only one section ll.--l3 isshown in the drawing.

The track section Pi B is provided with a track circuit comprising a source of current at the exit end and a track relay at the entrance end. As here shown, the source of track circuit current is a transformer F having its secondary 5 connected across the rails 1 and 1, and its primary 6 connected with the secondary ll of a line transformer J. The primary 12 of transformer J is constantly supplied with alternating current from a transmission line H. The track relay for section A-B is designated C and has a winding 8 connected across the rails of the section. This relay also has a second winding 7 supplied with energy from the secondary 11- ot a transformer J, the primary 12 oi. which is connected with the transmission line hi. it will be seen, therefore, that the traclr circuit includes the two track rails l and l in series.

The section i i-13 is also provided with a loop circuit which includes the two rails l and 1 in multiple. When track relay G for loop circuit for section Ar B is from second ary contact 14 or relay C wire 21, winding el ot a relay B to the middle point of winding 8 o1": relay] C, and then through the rails 1 and l in multiple to a resistance 22 from the middle point of which the circuit passes through the front contact 15 ofrelay G to the secondary 10 of transformer H lihen 10 of a ti'aiistor'ii'ier H through front lay C hack track relay C is de-energized, the circuit is the same except that the primary 10 of transformer H is reversely connected with the wire 21 and the track rails. stance, that is, when track relay G is energized, the loop circuit is supplied with cur rent of what I will term tnormal relative polarity, whereas when track relay C is decnergized, the loop circuit is supplied with what I will terin current of reverse relative polarity. The primary 9 or transformer H is constantly supplied with alternating current from the secondary 11 of the line transformer d.

It will he noted that a winding 4 of relay D is included in the loop circuit for section A-l5. This relay also comprises a winding 3 which is constantly supplied with alternatingcurrent from the.secondary 11 of the line trarisforznerd, and so the relay D is responsive to reve sa ls oi: the relative polarity of the current flowing in the loop circuit.

When this current is of normal relative polarity, relay D is energized in the normal direction and contact 18 is swung to the left; when the current in the loop circuit is of reverse relative polarity, relay D is enerizedjin the reverse directionand contact 18 1s swung; to the right. i i i Section A-B sprovidedwith a signal S comprising a proceed lamp G, a caution In the first inlamp and a stop lamp R. The circuit for the proceed lamp is from the secondary 16 ot a transformerL througlriront contact 13 'ot track relay C the winding-oi a checking relay E normal contact l8--l8 oi relay D", and the proceed lamp G to the secondary 16 of t ans'tormer L. The primary ii of transformer L is constantly suppliedwith alternating current from the line transformer J The normal circuit for the caution lamp Y is from secondary lhfthrough trout contact 13, wiiiding of relay E reve-rseor right hand contact 1818" of relay D and lamp Y to secondary 16. a The circuit for the stop lamp It is from secondary 16 through back contact 13 of relay C and the lamp R to secondary I The caution lamp isprovided ice with an auxiliary circuit which passes from secondary 16 through iront contact 13 of recontact 19 of checking relay 1)", resistance 20 and lamp Y to sccondarylG. It will he seen. from the foregoing that when the traclrrelay C is energized, and

relay D is energized in the normal direction, the proceed lamp G will be lighted; when track relay C is energized and relay D is energized in the reverse direction, the cantion lamp Y will be lighted; and when relay C is de-energized the stop lamp R will be lighted. It will also be seen that when the track relay C is energized and the line relay D is energized in the normal direction, if the proceed lamp G should burn out the checking relay I) will become de-energized, so that the auxiliary circuit through contact 19of relay E will be closed, with the result that the caution lamp Y will be lighted. I

thus avoid a dark signal and also avoid unnecessarily stopping a train as would be the case if the stop lamp R were lighted under the conditions just specified, it being noted that a caution indication is proper under these conditions, because section AB is not occupied. It Will further be seen that in the event of a failure of the loo circuit, line relay D will be de-energize so that check- 1 ing rela E will also be tie-energized, with 1 the resu t that caution lamp Y will be lighted if the track relay C is energized. The relay E therefore, performs the double function of checking the integrity of the proceed lamp G and also the integrity of the loop circuit.

The apparatus herein shown is intended for cooperation, with train-carried mechanism so arranged that 3. proceed indication is received on the train when the train is over a portion of track carrying track circuit current and also carrying loop current of normal relative polarity, that a caution indication is receivedon the train when the train is on a portion of track carrying loo current of reverse relative polarity an also track circuit current, and that a stop indication is received on the train in the absence of either 100 current or .track circuit current.

Signal 3 at location B is controlled by relays C D and E in the same manner that signal S is controlled by the corresponding relays at location A. I

Although I have herein shown and described only one form of apparatus embodying my invention, it is understood that various changes and modifications may be made therein within the scope of the appended claims without departing from the spirit and scope of my invention.

Having thus described my invention, what I claim is:

1. Incombination, a section of railway track, a loop circuit for said section including the track rails in multiple and a winding of a line relay, and a checking relay and a signal controlledjointly by said line relay.

2. In combination, a section of railway track, a loop circuit for said section including the track rails in multiple and a winding of a line relay, a signal for said section controlled by said linerelay, and a checking relay also controlled by said line relay for changing the indication given by said signal if the line relay becomes de-energized when said section is unoccupied.

In combination, a section of railway track, a loop circuit for said section includin the track rails in multiple and a source 0 current, means for reversibly connecting said source with said loop circuit, a line relay having a winding included in said loop circuit and responsive to reversals of the connection of the source with said circuit, a sig nal, a proceed circuit for said signal including a normal contact or said line relay and a checking relay, a caution circuit for said signal including a reverse contact of said line relay and said checking relay, and an auxiliary caution circuit for said signal including a back contact of said checking relay.

I. In combination, a section of railway track, a loop circuit for said section including the track rails in multiple and a source of current, means for reversibly connecting said source with said loop circuit, a line relay having a winding included in said loop circuit andrcsponsive torcversals of the corn nection of the source with said circuit, and a checking relay and a signal controlled Jointly by said line relay.

5. In combination, a section of railwa track, a loop circuit for said section inclu ing the track rails in multiple and a source of current, means for reversibly connecting said source with said loop circuit, a line relay having a winding included in said loop circuit and responsive to reversals of the connection of the source with said circuit, a signal for said section controlled by said relay and arranged to indicate proceed or caution according as the relay is energized in normal or reverse direction, and auxiliary means for.

causing said signal to indicate caution if said line relay becomes de-energized While the section is unoccupied.

6. In combination, a section of railway track, a track circuit for said section includmg the rails in series and a source of currcntas well as a winding of a track relay, a loop circuit for said section including the track rails in multiple and a winding of a line relay, a signal controlled jointly by said,

track relay andsaid line relay, and a check ing relay for said signal controlled by said track relay and by said line relay and by said signal.

7. In combination, a section of railway,

means for reversibly connectin said sourcewith said loop circuit, a line re ay having a winding included in said loop circuit and responsive to reversals of the connection of lot the source with said circuit, a signal, means for causing said signal to indicate proceed when said track relay is energized and said line relay is energized in normal direction, means for causing said signal to indicate caution When said track relay is energized and said line relay is energized in reverse direction, means for causing said signal to indicate stop when said track relay is de-energized and auxiliary means for causing said signal to indicate caution when said track relay is energized and said line relay is deenergized.

8. In combination, a section of railway track, a track circuit for said section including the rails in series and a source of current, a loop circuit for said section including the rails in multiple and a source of current, means for reversibly connecting said source with said loop circuit, a line relay having a wvinding included in said loop circuit and responsive to reversals of the connectionof the source with said circuit, a signal having proceed, caution and stop lamps, a circuit for said proceed lamp including a front contact of said track relay and a normal contact of said line relay and a checking relay, a circuit for said caution lamp including a front contact of said track relay and a reverse contact of said line relay and said checking relay, a circuit for said stop lamp includinga back contact of said track relay, and an auxiliary circuit for said caution lamp including a back contact of said checking relay.

In testimony whereof I aflix my signature.

CHARLES WV. FAILOR. 

